Results 141 to 150 of about 1,203,998 (246)

The size distribution of interstellar grains [PDF]

, 1987
Three major areas involving interstellar grains were investigated. First, studies were performed of scattering in reflection nebulae with the goal of deriving scattering characteristics of dust grains such as the albedo and the phase function asymmetry ...
Witt, Adolf N.
core   +1 more source

Collisional excitation in reactive systems: recent advances in modeling molecular processes for astrochemistry

Frontiers in Astronomy and Space Sciences
Collisional excitation in reactive systems plays a central role in astrochemistry. Accurate state-to-state rate coefficients are key parameter for the determination of excitation conditions of interstellar molecules with the most abundant species in ...
Paul Pirlot Jankowiak
doaj   +1 more source

Pitch-angle Focusing and Scattering of TeV Galactic Cosmic Rays Propagating in Local Interstellar Magnetic Fields

The Astrophysical Journal
We use Tibet AS γ anisotropy data for 4 TeV cosmic rays to investigate the properties of the pitch-angle focusing and diffusion caused by the interstellar magnetic field and turbulence.
N. D. Maalal, M. Zhang
doaj   +1 more source

Simulating Pulsar Signal Scattering in the Interstellar Medium with Two Distinct Scattering Phenomena [PDF]

, 2018
In this thesis, I discuss the creation of a simulation that attempts to reconstruct secondary spectra of pulsars by simulating the scattering in the interstellar medium. For the simulation, we focus on two distinct scattering phenomena, namely a coherent
Jussila, Adam P, Jussila, Adam P.
core   +1 more source

Pitch-angle Scattering of Cosmic Rays: Confronting Theory with Observations

The Astrophysical Journal Letters
Cosmic ray (CR) propagation is controlled by scattering in turbulent magnetic fields in space. In general, diffusive propagation is governed by pitch-angle diffusion in phase space.
Huirong Yan, Siqi Zhao, Ming Zhang
doaj   +1 more source

A Multilayer Perceptron to Extend and Improve Diatomic Molecule Collision Rate Coefficients

The Astrophysical Journal
A data-driven approach to improve the accuracy of state-resolved molecular collision data for the relaxation of vibrationally and rotationally excited molecules is developed.
Ruihan Wang, Darin E. Mihalik, Benhui Yang, Phillip C. Stancil, Teri J. Price, Robert C. Forrey, Naduvalath Balakrishnan, Roman V. Krems   +7 more
doaj   +1 more source

Scattering of Continuously Injected Pickup Ions of Oblique Pickup Angles in the Outer Heliosheath

The Astrophysical Journal
Pitch angle scattering of pickup ions (PUIs) in the outer heliosheath is studied using two-dimensional hybrid simulations, with the PUIs continuously injected at specified injection rates and pickup angles.
Ding Sheng, Kaijun Liu, Vladimir Florinski, Xiaocheng Guo   +3 more
doaj   +1 more source

A study of extended red emission in reflection nebulae [PDF]

, 1994
In the first part of this thesis spectroscopic observations of the Red Rectangle nebula are presented. A link is made between the most prominent unique emission line features, which are superimposed on the broad emission spectrum of the Red Rectangle ...
Watkin, Susan, Watkin, S
core  

Note on Interstellar Scattering

The Astrophysical Journal, 1937
openaire   +1 more source

Direct Samples of Interstellar and Interplanetary Material with IMAP. [PDF]

Space Sci Rev
Szalay JR, Provornikova E, Ayari E, Bzowski M, Christian ER, Funsten HO, Galli A, Gkioulidou M, Horányi M, Livi S, McComas DJ, Möbius E, Ogasawara K, Rahmanifard F, Rankin JS, Reisenfeld DB, Schwadron NA, Sternovsky Z, Swaczyna P, Turner D, Zank GP, Zirnstein EJ.   +21 more
europepmc   +1 more source